Get matched with top generator install pros in Spring Valley, IL

Q: How many days can a standby generator run continuously?

• <div><p>The <a href="https://www.angi.com/articles/how-long-can-whole-house-generator-run-continuously.htm">amount of time a standby generator can run continuously</a> is around <b>3,000 hours</b> on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home&rsquo;s natural gas supply are the best option for extended usage, as these won&rsquo;t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won&rsquo;t last as long, as these require fuel storage and regular refueling to stay running.</p></div>

Q: Where can you install a whole-house generator?

• <div><p>Whole-house generators need to be installed on level ground several feet away from walls and other objects. Because they tap into the electrical system directly, they usually need to be close to your home electrical panel for a transfer switch installation. It also helps with installation if they are near to a gas line or propane tank installation.</p></div>

Q: Is it better to repair or replace a malfunctioning generator?

• <div><p>It&rsquo;s usually better to repair your generator if it isn&rsquo;t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around <b>$300</b> on average, while <a href="https://www.angi.com/articles/how-much-does-it-cost-install-generator.htm">installing a new whole-house generator costs</a> around <b>$5,000 </b>on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.</p></div>

Q: What size generator do I need for a 1500-square-foot house?

• <div><p>A 1,500 square foot home will likely need a 15kW to 20kW generator. When deciding on whole-house generator size, add up the <a href="https://www.angi.com/articles/how-many-watts-house.htm">total wattage</a> of the devices that you&rsquo;d like to continue running during a power outage. That way, you can ensure you purchase a generator that can power your necessary appliances or medical equipment during an electrical emergency.</p></div>

Q: Do you need a permit to install a permanent or whole-house generator?

• <div><p>In most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home generators. A permit for a generator usually costs between <b>$50 and $250</b>, depending on where you live. Your electrician or certified generator installer will usually pull the permit for you&mdash;and might be required to do so by your building department&mdash;but you&rsquo;ll be on the hook for the cost of the permit. You should ask your installer before agreeing to any work if they will pull the necessary permits for your project.</p></div>

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Verified Reviews for Generator Install pros in Spring Valley, IL

*The Angi rating for Generator Install companies in Spring Valley, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

*The HomeAdvisor rating for Generator Install companies in Spring Valley, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.

Last update on March 02, 2026

Reviewed in March 2026
RRH did a fabulous job. He replaced my plaster ceiling and installed drywall. Work was done in the amount of time he stated and he did not go over budget with needing to add more time or materials. Highly recommend.
RRH Remodeling/Construction
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Reviewed in April 2023
Great customer service!! Very knowledgeable and hard working. Professional and quick installations process!!
Guajardo's Home Solutions DBA Aqua Medic
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Reviewed in November 2022
I hired A&K decking fencing and more to replace my front and back porch. Prior to hiring them, the front porch steps were loose, the railing was ineffective (for the front porch) and there was no railing on the back porch leaving quite a bit of a drop-off, not to mention it was sloping and...
A&K Decking Fencing and More
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Reviewed in March 2022
Its not the company's fault, it was the workers. The installation was perfect but missed something, the plug.
Triple Service Plumbing Heating & Air Conditioning
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Reviewed in November 2021
The company was excellent it went very well their staff and workers are very polite. They completed the job in least expected time and did a clean installation.
Elite Seamless Gutters, Inc.
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Reviewed in July 2021
On time, prep was awesome, whole crew was nice and clean cutÃ Â¢Ã Â Ã Â¦. Perfect install of our front parking area! I would strongly recommend this company!
A+ Driveway Replacement
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Reviewed in March 2021
I contacted AGG Roofing. Talked with Josh L and he helped me through the process of getting everything in order for my moms new roof. He and the crew were excellent, from the tear off, install, and clean up! Highly recommend AGG Roofing!
AGG Construction, Inc.
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Reviewed in November 2019
Terry s crew was excellent. They were very courteous and answered all our questions. The quality of the cabinets and the entire installation is excellent. I was amazed at how efficiently they did the electrical and plumbing. Our new kitchen is beautiful. I give a high recommendation to Terry s...
Terry's Remodeling
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Reviewed in October 2019
Great. Called and they were here in just a couple of days. Very nice young man (Josh) told us it was all so old, nothing was replaceable, which I already had figured. Installed new unit quickly, cleanly. Very happy with whole experience. Very glad to know such competent service is available...
Overhead Door Company Of Illinois Valley
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Reviewed in May 2019
Cherrytree Kitchens cabinets are excellent quality. The installers are professional and their work is impeccable. I highly recommend them.
Cherrytree Kitchens
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Find Generator install pros in Spring Valley

Tri-State Water, Power & Air

5.0(

)

Serving Spring Valley, IL and surrounding areas

Approved (Corporate)

In business since 1992

Free estimates

Emergency services offered

We are the experts in the field of Whole Home Generator Sales and Installation, with over 20 years of experience in the game.\nWe provide turn-key installation by licensed professionals - 24 hour emergency service - Remote Monitoring - Long term maintenance and service by factory trained technicians.

46 neighbors recently requested a quote

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Mid America Lightning Protection

4.5(

)

Serving Spring Valley, IL and surrounding areas

Approved

In business since 1969

Free estimates

Emergency services offered

"Responsive, fair pricing. Quality of installation could have been done a little better as rods were slightly crooked and they did not pull the wiring tout on top of house so not totally parallel to roof line."

+70

Response time6 hrs

Response rate94%

3 neighbors recently requested a quote

Serving Spring Valley, IL and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Joe, Mark, and Their Team did a Splendid Job for Us on this Business Phone Line Install. There are Very Knowledgeable and provided the Needed Assessment and "Fix" in a Very Timely Manner. I Highly Recommend Accent Tel USA! God Bless You! Philippians 1:3-6! Have a Wonderful Day in the Neighborhood & "Stay on the Nice List"! :)"

Response time3 hrs

Response rate99%

4 neighbors recently requested a quote

Serving Spring Valley, IL and surrounding areas

Approved

Free estimates

Small jobs welcome

Credit card accepted

At LSI repair we offer only the best and fair prices. We also specialize in heat treating furnaces but we cover a large array of services from residential to commercial from small to big.

3 neighbors recently requested a quote

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Electrical Avenue LLC

5.0(

)

Serving Spring Valley, IL and surrounding areas

Approved

In business since 2015

Free estimates

Credit card accepted

Electrical Avenue, located in Peru, IL, is your trusted source for comprehensive electrical services. With a team of certified professionals, we specialize in residential, commercial, and industrial electrical work, ensuring safety and efficiency for every project. Our commitment to quality and customer satisfaction sets us apart, as we strive to deliver reliable solutions tailored to your needs. From installations to repairs and upgrades, we handle it all with precision and expertise. Choose Electrical Avenue for dependable service and innovative electrical solutions in the Peru area.

Response time4 hrs

3 neighbors recently requested a quote

Recommended by100%of homeowners

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Todd

New to Angi

Serving Spring Valley, IL and surrounding areas

Approved

Free estimates

Emergency services offered

Hello, I offer a multitude of services including handyman, cabinet installation, a multitude of repair and construction services, and more. Feel free to reach out to me to see if I can help you with whatever services you need completed.

2 neighbors recently requested a quote

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Curtis Home Solutions

New to Angi

Serving Spring Valley, IL and surrounding areas

Approved

I am a jack of trades independent contractor/ handyman with 10+ years experience. I am not a licensed plumber, licensed electrician, or licensed roofer. With that said it's easier to just tell you the things that I don't do. I do not do drain work, I do not replace electrical lines or panel boxes, I do not replace plumbing lines which includes water and gas, and I do not replace roofs. Aside from that I can do everything else, and have the tools to do so.

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AOM Remodeling and Restoration

4.6(

)

Serving Spring Valley, IL and surrounding areas

In business since 2012

Free estimates

Emergency services offered

"Based on our past experience with AOM (interior painting), we used them to powerwash our home. They had all the appropriate equipment and did an excellent job. Our 20 year old vinyl siding looks totally refreshed. David is easy to work with and goes the extra mile. We will continue to AOM for future projects.
"

Recommended by90%of homeowners

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Lightning Defense, LLC (Illinois)

4.6(

136

)

Serving Spring Valley, IL and surrounding areas

In business since 1972

Free estimates

Emergency services offered

"John Sherlock and his wife are the consummate professionals! I would highly recommend them. Their attention to detail and installation quality, was superb. Johns knowledge of Lighting protection is apparent after 40+ years. You will not be disappointed . July 2020. D.Riggio Carterville, Illinois"

+13

Response time4 hrs

Recommended by100%of homeowners

Serving Spring Valley, IL and surrounding areas

In business since 2008

Emergency services offered

Credit card accepted

"They were informative! It's a family business that is generational in their craft. They explained my unit to me and gave me tips to improve it's care. I will be using them in the future for maintenance."

Recommended by82%of homeowners

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Showing 1-10 of 56

Generator Install questions, answered by experts

The amount of time a standby generator can run continuously is around 3,000 hours on average. However, standby generators can generally run indefinitely as long as they have a continuous fuel supply. Generators hooked up to a home’s natural gas supply are the best option for extended usage, as these won’t rely on a finite fuel supply based on how much you have in storage. Generators running on liquid propane or diesel won’t last as long, as these require fuel storage and regular refueling to stay running.

Whole-house generators need to be installed on level ground several feet away from walls and other objects. Because they tap into the electrical system directly, they usually need to be close to your home electrical panel for a transfer switch installation. It also helps with installation if they are near to a gas line or propane tank installation.

It’s usually better to repair your generator if it isn’t working properly, as it will typically be much more affordable and should yield similar results. Generator repairs cost around $300 on average, while installing a new whole-house generator costs around $5,000 on average. The only exception is if you know your generator is reaching the end of its useful life, usually between 30 and 40 years. If you have an older generator, you could face multiple repairs in the coming years, which might mean that a full replacement will be more cost-effective over time.

A 1,500 square foot home will likely need a 15kW to 20kW generator. When deciding on whole-house generator size, add up the total wattage of the devices that you’d like to continue running during a power outage. That way, you can ensure you purchase a generator that can power your necessary appliances or medical equipment during an electrical emergency.

In most municipalities, you will need a permit to install a permanent home generator, including emergency backup, partial-home, and whole-home generators. A permit for a generator usually costs between $50 and $250, depending on where you live. Your electrician or certified generator installer will usually pull the permit for you—and might be required to do so by your building department—but you’ll be on the hook for the cost of the permit. You should ask your installer before agreeing to any work if they will pull the necessary permits for your project.

The Spring Valley, IL homeowners’ guide to generator installs

From average costs to expert advice, get all the answers you need to get your job done.

See all articles

Alison Kasch
•
Apr 4, 2026Apr 4, 2026
How Much Does It Cost to Install a Generator Transfer Switch? [2026 Data]
The cost to install a generator transfer switch depends on several factors. Our guide will help you understand all of the costs.
Taylor Freitas
•
Apr 6, 2026Apr 6, 2026
How Much Does a Whole-House Generator Cost? [2026 Data]
The average cost of a whole-house generator falls between $5,000 and $25,000. Keep reading to learn how much you can expect to spend.
Alison Kasch
•
May 3, 2026May 3, 2026
How Much Does a Natural Gas Generator Cost? [2026 Data]
Natural gas generators are whole-home standby generators that are connected to your home’s natural gas line. The average cost for a natural gas generator is $12,000.
Jenna Jonaitis
•
Apr 6, 2026Apr 6, 2026
7 Questions to Ask About Installing a Portable Backup Generator
Installing a portable generator can power key appliances during outages. Learn about the best backup generator questions to discuss with a pro.
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•
May 3, 2026May 3, 2026
How Do Whole-House Generators Work?
Whole house generators are a power alternative that can deal with frequent blackouts and other problems. Here’s how they function.
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•
May 21, 2026May 21, 2026
How to Hire a Generator Repair Pro
Learn how to find and hire a qualified generator repair pro. Get expert tips on vetting credentials, asking the right questions, and choosing the best technician.